BLOCK DIAGRAM
C
IN
PL
C
IN
NL
V
IN
L
Analog
Front-End
Circuit
(+)
Delta-Sigma
Modulator
(–)
Decimation
and
High Pass Filter
LRCIN
V
REF
L
V
REF
R
BCKIN
Reference
ADC
Serial Data
Interface
DIN
Analog
Front-End
Circuit
(–)
Delta-Sigma
Modulator
(+)
Decimation
and
High Pass Filter
Loop Control
V
IN
R
C
IN
NR
C
IN
PR
DOUT
V
OUT
L
Analog
Low-Pass
Filter
Multi-Level
Delta-Sigma
Modulator
DAC
Interpolation
Filter
8X Oversampling
ML (FMT0)
(1)
Mode
Control
Interface
MC (FMT2)
(1)
VCOM
Analog
Low-Pass
Filter
Multi-Level
Delta-Sigma
Modulator
V
OUT
R
Interpolation
Filter
8X Oversampling
Reset
MD (FMT1)
(1)
RSTB
Power Supply
Clock/OSC Manager
AGND2
V
CC
2
AGND1
V
CC
1
DGND
V
DD
CLKIO
XTO
XTI
NOTE: (1) FMT0, FMT1, FMT2 are for PCM3001 only.
470pF
C
IN
PL 10
9
C
IN
NL
2.2µF
+
1
V
IN
L
15kΩ
1kΩ
(+)
Delta-Sigma
Modulator
1kΩ
V
REF
L
(–)
4
4.7µF
+
V
REF
FIGURE 1. Analog Front-End (Single-Channel).
®
9
PCM3000/3001
BURR-BROWN [ BURR-BROWN CORPORATION ]
